I would like to thank my adviser Dr. Brad Meyer, for teaching me so much
knowledge and skills, for telling me so much history and funny stories, for 
helping me with research and life. He masters math, physics and programming.  
And he is still learning new stuff everyday, with interest and passion.
He is a real scientist. I will never forget his charming personality in my life.

I also would like to thank my committee members, Dr. Brittain, Dr. Hartmann
and Dr. Sosolik, for giving me good suggestion on my research. Dr. Lih-sin The
helped me with computational physics and the usage of IDL and I appreciate it.
I thank Dr. 
Sasha Krot and Dr. Gary Huss for hosting me in Hawaii and showing real 
meteorites. I thank Dr. Zhang Junjun for letting me see CAIs for the first 
time. I
thank Dr. Tang Haolan and Liu Nan for teaching me basic cosmochemistry. All the 
three girls above are from University of Chicago. Also I'd like to thank
Ginger Bryngelson and other friends here in PandA Clemson. I'll remember our
good times. 

Dr. Donald D. Clayton is still doing research at almost his 80's. It's a great
honor to work with him. His mind is sharp, his idea is clear, and his words
are humorous. Wish him all the best.

This work is sponsored by NASA Earth and Space Science Fellowship. 
